feat: Add workout program management

- Create database tables: workout_program, program_session, person_program_assignment.
- Add Flask blueprint `routes/programs.py` with routes for creating, listing, viewing, and deleting programs.
- Implement program creation form (`templates/program_create.html`):
    - Allows defining program name, description, and multiple sessions.
    - Each session includes a name and dynamically added exercise selections.
    - Uses `tail.select` for searchable exercise dropdowns.
    - JavaScript handles dynamic addition/removal of sessions and exercises.
- Implement backend logic for program creation:
    - Parses form data including multiple exercises per session.
    - Automatically finds or creates non-person-specific tags based on selected exercises for each session.
    - Saves program and session data, linking sessions to appropriate tags.
- Implement program list view (`templates/program_list.html`):
    - Displays existing programs.
    - Includes HTMX-enabled delete button for each program.
    - Links program names to the view page using HTMX for dynamic loading.
- Implement program detail view (`templates/program_view.html`):
    - Displays program name, description, and sessions.
    - Parses session tag filters to retrieve and display associated exercises.
- Update changelog with details of the new feature.

app.py

@@ -14,6 +14,7 @@ from routes.sql_explorer import sql_explorer_bp # Import the new SQL explorer bl
 from routes.endpoints import endpoints_bp # Import the new endpoints blueprint
 from routes.export import export_bp # Import the new export blueprint
 from routes.tags import tags_bp # Import the new tags blueprint
+from routes.programs import programs_bp # Import the new programs blueprint
 from extensions import db
 from utils import convert_str_to_date, generate_plot
 from flask_htmx import HTMX
@@ -48,6 +49,7 @@ app.register_blueprint(sql_explorer_bp) # Register the SQL explorer blueprint (p
 app.register_blueprint(endpoints_bp) # Register the endpoints blueprint (prefix defined in blueprint file)
 app.register_blueprint(export_bp) # Register the export blueprint (prefix defined in blueprint file)
 app.register_blueprint(tags_bp) # Register the tags blueprint (prefix defined in blueprint file)
+app.register_blueprint(programs_bp) # Register the programs blueprint (prefix defined in blueprint file)
 
 @app.after_request
 def response_minify(response):